Answer:
By factoring
Step-by-step explanation:
4x^2+25=20x then:
4x^2-20x+25=0
factoring:
(2x-5)(2x-5)=0
2x=5, x=2.5
Answer:
0.00466
Step-by-step explanation:
8+7+10+6 = 31
(8C2×7C3×10C4×6C5) ÷ 31C14
= 0.004656415426
= 0.00466 (3 sf)
Answer:
Putting the value in x = 2 , y =4 in 2x - 2y we get,
2 × 2 - 4× 2= 4-8 = -4
Putting the value in z = 3 in z - 5 we get,
z - 5 = 3 - 5 = -2
The answer to the expression is -2.
